Fan with dustproof effect

Abstract

The fan with the dustproof effect comprises a fan frame assembly, a fan blade assembly, a magnetic ring assembly, a stator assembly, a stator sleeve and a bearing, the stator sleeve is located on the periphery of the stator assembly, the magnetic ring assembly is located on the periphery of the stator sleeve, and the stator sleeve is made of magnetic permeable materials; the fan frame assembly is provided with a base plate and a sleeve located on the base plate, the bearing is located in the sleeve, the center of the stator sleeve is provided with a shaft hole, the end, facing the base plate, of the stator sleeve is provided with an opening, the opening of the stator sleeve is fixed to the base plate, and the stator assembly and the bearing are wrapped in a cavity defined by the stator sleeve and the base plate. According to the utility model, the stator sleeve made of the magnetic permeable material is additionally arranged outside the stator assembly, and the stator sleeve is fixed with the chassis of the fan frame assembly, so that the stator assembly and the bearing are wrapped in the approximately closed cavity under the condition that the transmission magnetic field of the stator assembly is not influenced, and the dustproof and oil-proof effects are good.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan with a dust-proof effect. Background Art

[0002] For cost considerations, most of the bearings of fans use oil-impregnated bearings, which are more likely to be contaminated with dust, resulting in increased power consumption of the fans, generation of noise, and shortened service life. Therefore, in order to improve their life cycle, a more reasonable dust-proof structure is needed.

[0003] The rotor of the fan is located outside the stator assembly. Since the stator assembly needs to provide a rotating magnetic field for the rotor, a protective structure is usually not provided outside the stator assembly. At present, most of the design methods for the dust-proof function of the fan bearing part are to increase sealing parts such as sealing ring structures to play a role in dust-proof and oil-proof. This design greatly increases the cost and assembly difficulty of the product, and dust and particles are also easily introduced into the stator assembly.

[0004] In addition, in the existing technology fans, it is necessary to first position the stator core and the PCB board, and then fix the stator core and the sleeve of the fan frame by dispensing glue. The PCB board is limited between the stator core and the fan frame, and the operation process is complex. Summary of the Utility Model

[0005] In order to solve the technical problems that the existing technology fans only play a dust-proof role through the sealing parts installed outside the bearings, and it is impossible to avoid dust from entering the stator assembly, resulting in large assembly difficulty and poor dust-proof effect of the fans, the utility model provides a fan with a dust-proof effect to solve the above problems.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a fan with a dust-proof effect, including a fan frame assembly, a blade assembly, a magnetic ring assembly, a stator assembly, a stator sleeve and a bearing. The stator sleeve is located on the outer periphery of the stator assembly, the magnetic ring assembly is located on the outer periphery of the stator sleeve, and the stator sleeve is made of a magnetic-permeable material; the fan frame assembly has a chassis and a sleeve located on the chassis. The bearing is located in the sleeve. The center of the stator sleeve has a shaft hole and is open at one end facing the chassis. The opening of the stator sleeve is fixed to the chassis, so that the stator assembly and the bearing are wrapped in the cavity formed by the stator sleeve and the chassis.

[0007] Further, the stator sleeve includes a sleeve body, a bottom plate and an installation port located at both ends of the sleeve body. The shaft hole is located at the center of the bottom plate, and the installation port is fixed to the chassis.

[0008] Further, a bearing chamber is provided on the inner bottom surface of the stator sleeve. The bearing chamber is in interference fit with the sleeve, and the bearing is wrapped in the cavity formed by the bearing chamber and the sleeve.

[0009] Further, a plurality of buckles are provided on the installation opening. The chassis includes a central plate located on the outer periphery of the sleeve and a snap ring located on the outer periphery of the central plate. A card slot for cooperating with the buckle is provided at the connection between the central plate and the snap ring.

[0010] Further, the inner peripheral surface of the card slot is located on the central plate, and a chamfer is provided on the inner peripheral surface of the card slot.

[0011] Further, the stator assembly includes a stator core and a PCB board. The diameter of the installation opening is larger than the diameter of the sleeve body, and the PCB board is located within the installation opening.

[0012] Further, the PCB board is fixed by potting with the stator core and the sleeve, and a potting space is formed inside the stator sleeve.

[0013] Further, the sleeve, the central plate, the snap ring and the outer frame of the fan frame assembly are integrally injection-molded.

[0014] Further, the outer end surface of the central plate is recessed inward relative to the snap ring. When the buckle is engaged with the card slot, the buckle does not protrude from the outer end surface of the snap ring.

[0015] Further, the sleeve body, the bottom plate and the installation opening are integrally formed.

[0016] Further, the card slot penetrates through both ends of the central plate and does not penetrate through the outer end surface of the snap ring. When the buckle is engaged with the card slot, the buckle abuts against the inner end surface of the card slot located on the snap ring.

[0017] The beneficial effects of the present utility model are as follows:

[0018] (1) In the present utility model, a stator sleeve made of a magnetic permeable material is added outside the stator assembly, and the stator sleeve is fixed to the chassis of the fan frame assembly. Without affecting the transmission of the magnetic field by the stator assembly, the stator assembly and the bearing are wrapped in an approximately enclosed cavity, and the dust and oil prevention effects are good.

[0019] (2) The stator sleeve in the present utility model provides a potting space for the PCB board, so that the PCB board is fixed by potting with the stator core and the sleeve, thereby eliminating the dispensing step between the sleeve and the stator assembly, simplifying the assembly procedure, and enhancing the fixing strength.

[0020] (3) In the present utility model, a chamber for accommodating the bearing is formed by the cooperation of the bearing chamber on the stator sleeve and the sleeve, further protecting the bearing and playing a role in dust and oil prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present utility model will be further described below with reference to the drawings and embodiments.

[0022] Figure 1 is an exploded view of a specific embodiment of the fan with dust prevention effect according to the present utility model;

[0023] Figure 2 is a perspective view of the outer side of the stator sleeve in the present utility model;

[0024] Figure 3 is a perspective view of the inner side of the stator sleeve in the present utility model;

[0025] Figure 4 is a perspective view of the fan frame assembly in the present utility model;

[0026] Figure 5 is the front view of the fan frame assembly in the present utility model;

[0027] Figure 6 is the assembly schematic diagram of the fan frame assembly and the stator sleeve in the present utility model.

[0028] In the figure, 1. Fan frame assembly, 2. Blower blade assembly, 3. Magnetic ring assembly, 4. Stator assembly, 401. Stator core, 402. PCB board, 5. Stator sleeve, 501. Sleeve body, 502. Bottom plate, 503. Installation opening, 504. Bearing chamber, 6. Bearing, 7. Chassis, 701. Central plate, 702. Snap ring, 8. Sleeve, 9. Shaft hole, 10. Buckle, 11. Card slot, 12. Outer frame, 13. Buckle piece, 14. Card, 15. Magnet. Specific implementation mode

[0029] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0030] Embodiment 1

[0031] As Figures 1 - 5 shown, a blower with a dust-proof effect includes a fan frame assembly 1, a blower blade assembly 2, a magnetic ring assembly 3, a stator assembly 4, a stator sleeve 5 and a bearing 6. The fan frame assembly 1 is used to fix the stator assembly 4 and the magnetic ring assembly 3. The blower blade assembly 2 provides air volume by rotating. The bearing 6 is used to rotatably connect the magnetic ring assembly 3 and the fan frame assembly 1 to reduce friction and noise. The stator assembly 4 includes a stator core 401 and a PCB board 402 and is used to provide a rotating magnetic field for the magnetic ring assembly 3. The magnetic ring assembly 3 provides a rotating power for the blower blade assembly 2. The stator sleeve 5 can protect the stator assembly 4 and play a role in dust prevention.

[0032] The stator sleeve 5 is located on the outer periphery of the stator assembly 4, and the magnetic ring assembly 3 is located on the outer periphery of the stator sleeve 5. The stator sleeve 5 is made of a magnetic-permeable material, such as plastic. In this way, the stator sleeve 5 will not affect the stator assembly 4 from cutting the magnetic induction lines generated by the magnetic ring assembly 3, enabling the stator assembly 4 and the magnetic ring assembly 3 to cooperate and operate normally.

[0033] The fan frame assembly 1 has a chassis 7 and a sleeve 8 located on the chassis 7. The bearing 6 is located inside the sleeve 8. Usually, a retaining piece 13, a card 14, and a magnet 15 are arranged below the bearing 6 inside the sleeve 8. The retaining piece 13 is used to reinforce the rotating shaft to prevent the blade assembly 2 from falling off. The card 14 is used to space the rotating shaft from the magnet 15 to prevent the blade assembly 2 from rubbing against the magnet 15. The magnet 15 can reduce the axial movement amount of the blade assembly 2. The center of the stator sleeve 5 has a shaft hole 9 and is open at one end facing the chassis 7. The shaft hole 9 allows the rotating shaft of the fan to pass through. The opening of the stator sleeve 5 is fixed to the chassis 7, so that the stator assembly 4 and the bearing 6 are wrapped in the cavity formed by the stator sleeve 5 and the chassis 7. The stator sleeve 5 can not only protect the bearing 6 but also protect the stator assembly 4, thus effectively preventing dust from entering the inside of the stator assembly 4 and increasing the service life of the fan.

[0034] The setting of the stator sleeve 5 can not only achieve a good dust-proof effect but also realize the potting installation of the PCB board 402, simplifying the installation process. After using the stator sleeve 5, a potting space is formed inside the stator sleeve 5, and the PCB board 402 can be potted and fixed to the stator core 401 and the sleeve 8. Without the stator sleeve 5, the potting process of the product cannot be realized. It is necessary to use the inside of the stator sleeve 5 as the space for potting, so that the epoxy resin flows inside the stator sleeve 5 and fills up to the PCB board 402. On the basis of potting, the original dispensing scheme for the sleeve 8 can also be cancelled. Without potting, the sleeve 8 must be dispensed to firmly fix the stator assembly 4 and the sleeve 8.

[0035] The specific structure of the stator sleeve 5: As Figure 2 and Figure 3 shown, it includes a sleeve body 501, and a bottom plate 502 and an installation opening 503 located at both ends of the sleeve body 501. The shaft hole 9 is located at the center of the bottom plate 502. The installation opening 503 is fixed to the chassis 7. Preferably, the sleeve body 501, the bottom plate 502, and the installation opening 503 are integrally formed. The diameter of the installation opening 503 is preferably larger than the diameter of the sleeve body 501. The inner sides of the bottom plate 502 and the sleeve body 501 are assembled with the stator core 401 to achieve a positioning function. The PCB board 402 is placed inside the installation opening 503 to protect the PCB board 402. The different diameter settings of the sleeve body 501 and the installation opening 503 correspond to the stator core 401 and the PCB board 402 respectively, realizing the axial positioning of the two components.

[0036] The installation opening 503 and the chassis 7 can be fixed by means such as dispensing or threaded fitting. In the present invention, snap connection is preferably used for fixation. As Figure 3 andFigure 5 As shown, a number of buckles 10 are provided on the installation opening 503. The chassis 7 includes a central plate 701 located on the outer periphery of the sleeve 8 and a retaining ring 702 located on the outer periphery of the central plate 701. A slot 11 that cooperates with the buckle 10 is provided at the connection between the central plate 701 and the retaining ring 702. In the traditional fan frame assembly 1, the chassis 7 is a simple disc, and there is an outer frame 12 outside the chassis 7. In the present utility model, the chassis 7 is changed to a combination of the central plate 701 and the retaining ring 702. Grooves are provided on both the outer peripheral surface of the central plate 701 and the inner peripheral surface of the retaining ring 702. After the grooves are butted, the slot 11 is formed. The central plate 701 and the retaining ring 702 can be separately manufactured and then injection-molded with other components of the fan frame assembly 1 into one body.

[0037] To prevent the buckle 10 from protruding beyond the outer end face of the chassis 7 and affecting the assembly of the fan with other components, in a further design, the outer end face of the central plate 701 is recessed inward relative to the retaining ring 702. When the buckle 10 cooperates with the slot 11, the buckle 10 does not protrude beyond the outer end face of the retaining ring 702. The outer end face of the central plate 701 refers to the end face of the central plate 701 facing away from the sleeve 8, that is, Figure 6 the height of the lower end face of the central plate 701 in [reference] is higher than the height of the lower end face of the retaining ring 702. After the buckle 10 is assembled, it is flush with the lower end face of the retaining ring 702 or higher than the lower end of the retaining ring 702.

[0038] The buckle 10 is buckled on the end face of the central plate 701. For the convenience of installation, the slot 11 preferably penetrates through both ends of the central plate 701. At this time, the buckle 10 is buckled on the outer end face of the central plate 701. In order to achieve the axial limit of the buckle 10, the slot 11 preferably does not penetrate through the outer end face of the retaining ring 702. When the buckle 10 cooperates with the slot 11, the buckle 10 abuts against the inner end face of the slot 11 located on the retaining ring 702, that is, the groove on the central plate 701 axially penetrates, and the groove on the retaining ring 702 only extends to the upper end of the retaining ring 702, so that the axial limit of the buckle 10 can be achieved through the retaining ring 702. Due to the above irregular structural design of the slot 11, part of the slot 11 is arranged on the central plate 701 and part is arranged on the retaining ring 702. The central plate 701 and the retaining ring 702 are separately manufactured and then injection-molded into one body, which can reduce the processing difficulty of the slot 11.

[0039] In a further design, a chamfer is provided on the inner peripheral surface of the slot 11. The chamfer is to make the assembly of the slot 11 and the buckle 10 on the stator sleeve 5 more convenient. Since the inner peripheral surface of the slot 11 is located on the central plate 701, the chamfer is designed on the central plate 701.

[0040] Embodiment Two

[0041] On the basis of Embodiment One, as shown in Figure 3 and Figure 6As shown, a bearing chamber 504 is provided on the inner bottom surface of the stator sleeve 5. The bearing chamber 504 is in interference fit with the sleeve 8. The bearing 6 is wrapped in the cavity formed by the bearing chamber 504 and the sleeve 8. The fit between the bearing chamber 504 and the sleeve 8 provides an independent protection space for the bearing 6, further playing a role in preventing oil and dust, greatly increasing the dust-proof effect of the fan and extending the service life of the fan.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "inner", "outer", "axial", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0043] In addition, in the description of the present invention, unless otherwise specified, the meaning of "several" is two or more.

[0044] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments.

[0045] Taking the above ideal embodiment of the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A fan with a dust-proof effect, characterized in that: It includes a fan frame assembly (1), a blade assembly (2), a magnetic ring assembly (3), a stator assembly (4), a stator sleeve (5), and a bearing (6). The stator sleeve (5) is located on the outer periphery of the stator assembly (4), the magnetic ring assembly (3) is located on the outer periphery of the stator sleeve (5), and the stator sleeve (5) is made of a magnetic-permeable material. The fan frame assembly (1) has a chassis (7) and a sleeve (8) located on the chassis (7). The bearing (6) is located inside the sleeve (8). The center of the stator sleeve (5) has a shaft hole (9) and is open at one end facing the chassis (7). The opening of the stator sleeve (5) is fixed to the chassis (7) so that the stator assembly (4) and the bearing (6) are wrapped in the cavity formed by the stator sleeve (5) and the chassis (7).

2. The blower with a dust-proof effect according to claim 1, characterized in that: The stator sleeve (5) includes a sleeve body (501), and bottom plates (502) and mounting openings (503) located at both ends of the sleeve body (501). The shaft hole (9) is located at the center of the bottom plate (502), and the mounting opening (503) is fixed to the chassis (7).

3. The blower with dust-proof effect according to claim 1, characterized in that: The inner bottom surface of the stator sleeve (5) is provided with a bearing chamber (504). The bearing chamber (504) has an interference fit with the sleeve (8), and the bearing (6) is wrapped in the cavity formed by the bearing chamber (504) and the sleeve (8).

4. The blower with a dust-proof effect according to claim 2, wherein: A number of buckles (10) are provided on the mounting opening (503). The chassis (7) includes a center plate (701) located on the outer periphery of the sleeve (8) and a retaining ring (702) located on the outer periphery of the center plate (701). A card slot (11) for cooperating with the buckle (10) is provided at the connection between the center plate (701) and the retaining ring (702).

5. The blower with a dust-proof effect according to claim 4, characterized in that: The inner peripheral surface of the card slot (11) is located on the center plate (701), and the inner peripheral surface of the card slot (11) is provided with a chamfer.

6. The blower with a dust-proof effect according to claim 2, wherein: The stator assembly (4) includes a stator core (401) and a PCB board (402). The diameter of the mounting opening (503) is larger than the diameter of the sleeve body (501), and the PCB board (402) is located inside the mounting opening (503).

7. The blower with a dust-proof effect according to claim 6, characterized in that: The PCB board (402) is fixed by potting with the stator core (401) and the sleeve (8), and a potting space is formed inside the stator sleeve (5).

8. The blower with a dust-proof effect according to claim 4, characterized in that: The sleeve (8), the center plate (701), the retaining ring (702), and the outer frame (12) of the fan frame assembly (1) are integrally injection-molded.

9. The blower with dust-proof effect according to claim 4, characterized in that: The outer end surface of the center plate (701) is recessed inward relative to the retaining ring (702). When the buckle (10) cooperates with the card slot (11), the buckle (10) does not protrude from the outer end surface of the retaining ring (702).

10. The blower with dust-proof effect according to claim 9, characterized in that: The card slot (11) penetrates through both ends of the center plate (701) and does not penetrate through the outer end surface of the retaining ring (702). When the buckle (10) cooperates with the card slot (11), the buckle (10) abuts against the inner end surface of the card slot (11) located on the retaining ring (702).

Images